Perpetual calendar



Nov. 29, 1932. H. c. HANROTT PERPETUAL CALENDAR 2 Sheets-Sheet 1 FIG. I.

Filed Jan. 27, 1951 SEPTEMB R Nov. 29, 1932. c HANROTT 1,889,359

PERPETUAL CALENDAR Filed Jan. 27, 1931 2 Sheets-Sheet 2 FIG.3.

SEPTEMBER HG. 5

DA" TAIL! Patented Nov. 29, 1932 ATENT OFFICE HARCOURT CORY HANROTT, OFWESTMINSTER, LONDON, ENGLAND PERPETUAL CALENDAR Application filedJanuary 27, 1931, Serial No. 511,609, and in Great Britain February 5,1930.

According to the present invention the calendar comprises a casing, amonth sheet visible through an aperture in the casing, and

a cancellation disc, on whichthe cancelling lines are arranged as aseries of interrupted concentric circles, mounted to rotate between thewall of the casing and the month sheet.

The month sheet, on which the various calendar months are written, ispreferably mounted in the casing so as to enable it to be 2o readilyadjusted, when it is necessary to change the month.

The month sheet may consist of a rotatably mounted disc but in thepreferred construction it is removably positioned between the front andback of the casing. For this purpose the back of the casing may bedetachable or an opening is provided along one edge through which themonth sheet can be removed. The month sheet has printed thereon thevarious calendar months grouped around and arranged concentrically withthe axis of rotation of the cancellation disc.

The names of the month may be arranged on another rotatably mounted(third) disc or a sheet that is adjustable.

In the preferred embodiment of the invention the cancellation disc islocated at the back of the front of the casing and is secured to aspigot passing through an aperture in the front and integral with anoperating knob.

The third disc is rotatably mounted on the front side of the back of thecasing by means of a hollow rivet and the names of the months printedthereon are visible through apertures 4 cut in the month sheet adjacenteach calendar month and through the cancellation disc which is formed ofcelluloid, and also through the aperture in the front of the casing,this latter aperture being of such size as g; enable a single calendarsection being visi- When it is desired to change the calendar sectionwhich is visible through the aperture 1n the casing front, the monthsheet is slid out of the casing (or the back of the casing removed) andthe month sheet is then turned and r-e-inserted with the desiredcalendar section visible through the aperture. To enable the third discto be rotated to bring the required month name in line with itsaperture, the back of the casing has also formed therein an arcuate slotto enable the third disc to be turned by thumb or finger.

It will be understood that the casing is of such size as to contain thecancellation disc and the third disc without distortion thereof.

In order however, to diminish the height of the casing, more especiallyin the case of a desk model the axis of rotation of the cancellationdisc may be lowered. This is rendered possible by forming the disc offlexible material and bending its lower periphery out of the verticalplane, the casing being provided with a housing or base portion intowhich the periphery of the disc extends. This entails a correspondinglowering of the month sheet.

The invention is illustrated in the accompanying drawings in whichFigure 1 is an elevation of a perpetual calendar,

Figure 2 being a rear view with the back and base of the casing removed.

Figure 3 is a vertical section of the caleng. dar.

Figure 4 is an elevation showing the back of the casing from the rearand the month disc carried thereby.

Figures 5 and6 are detail views of the innermost circle each increasebeing equal to the distance apart, measured along a circumference of thenumerals representing seven days of the week written on the month sheet.The disc 4 is secured to an operating knob 7 which has a bearing at 8 ina cut out portion of the front 1 of the casing. Secured to the rear ofthe front 1 is a base piece 9 (see Figure 3) which is hollow for thereception of the periphery of the disc 4 and the lower side of the monthsheet 5. It is obvious that this arrangement permits the vertical heightof the casing to be diminished and moreover the base piece 9 functionsalso to support the casing, although this is not essential as it may besupported by a hinged flap in the usual manner. 7 V

The casing at its base may in some cases conveniently terminate in a penrest or such like receptacle (not shown).

WVith a hanging wheel where the vertical dimension isv not ofimportance, the base piece 9 is eliminated and the size of the casingcorrespondingly increased.

The rear of the front 1 is cut away at 10 to form a recess for thereception-of the back 2 and lugs 11 are provided for positioning themonth sheet 5. Securing pieces are also mounted on the lugs 11 forholding the back in place. The back 2 is shaped to fit into the recessin the front and so as to clear the lugs 11. 12 is a slot to enablefinger or thumb adjustment of the month name disc 6 which is rotatablymounted at 13. Alternatively the disc 6 may be operated by means of aknob. 7

Referring to Figure 6 the month sheet has printed or otherwise writtenon it the various calendar months, and when in position it is locatedbetween the cancellation disc 4, and month name disc 6, slots 14 beingcut in it beneath each calendar month. to enable the month name to beread. While the month name is visible through the aperture 3 a separateaperture may of course be provided in the casing through which the monthnames are visible, 15 are notches cut in the sides of the month sheet toensure its proper registration with the cancellation disc 4 and with themonth name disc 6. It will be understood that while the form of monthsheet as illustrated is preferred, a fixed month ble through an aperturetherein, may be rotatably carried on the back of the front 1 of thecasing.

The figures on these discs are preferably comparatively large in sizefor distance vision.

What I claim is 1.- In a perpetual calendar of the type set out, thecombination of a casing, said casing having an aperture in the frontthereof, a detachable back on the casing alignment lugs on the casing, amonth sheet visible through the aperture in the casing, a cancellationdisc having cancelling lines arranged in a series of interruptedconcentric circles, mounted between the wall of the casing and the monthsheet, a month name disc rotatably mounted in the casing, and means forrotating the cancellation disc, said month sheet and back having cutaway portions for engagement with the alignment lugs on the casing.

2. In a perpetual calendar of the type set out, the combination of acasing, said casing having an aperture in the front thereof, alignmentlugs on the casing, a detachable back on the casing, a cancellation dischaving cancelling lines arranged in a series of interrupted concentriccircles and rotatably supported by the front of the casing, a monthsheet visible through the aperture in the front of the casing and alsoprovided with apertures, and a month name disc rotatably mounted on therear of the casing, the names thereon being visible through one of thesaid apertures in the month sheet, said month sheet and back having cutaway portions for engagement with the alignment lugs on the 5 casing,and means for rotating the cancellation disc.

3. A perpetual calendar as claimed in the foregoing claim 1 comprising acasing having a housing for the reception of a segmental portion of thecancellation disc, whose axis is relatively lowered with respect to itsnormal position in the casing by bending the disc out of its normalplane, the bent out segmental portion lying within the housing.

4. In a perpetual calendar, the combination of a casing including adetachable back and having an aperture in the front, a month name diskrotatably supported on the back of the casing, -a month sheet visiblethrough a l I the aperture in the casing and formed with apertures forviewing the month names on the month name disk, and a rotatablecancellation disk having cancelling lines arranged in a series ofinterrupted concentric circles mounted in front of the month sheet.

5. A calendar of the type set out having a casing provided with anaperture, means therein havin day delineations thereon, a cancellationdlsk movable over said delineations, and a part extending at an anglefrom the casing, said part deflecting and maintaining the lower portionof said disk out of its normal plane.

6. A calendar of the type set out having a casing provided with anaperture, means therein having day delineations thereon, a flexiblecancellation disk in the casing having knob means journalled in thecasing ad jacent the front and operable to move the disk overthedelineations, and a base ex- I tending rearwardly from the casing,said base deflecting and maintaining the lower portion of said disk outof its normal plane.

7. A calendar according to claim 6 Where in said delineations arecarried by a flexible element in the rear of said disk, said elementhaving the lower portion deflected and main- Eained deflected like saiddisk and by said ase.

8. A calendar of the type set out having a mounting provided with anaperture, a sheet having a plurality of calendar members thereon, saidsheet being shiftable to different positions relatively to the mountingto selectively dispose said calendar members in registry with saidaperture, each calendar member having day delineations in curvilinearformation, alignment means on the mounting for setting said sheet toalign the respective calendar members with the aperture, and a rotatablymounted cancellation disk provided with relatively opaque markingscurvilinearly arranged correspondingly to said delineations, rotation ofthe disk caus ing the marking progressively to move over the saiddelineations.

9. In a perpetual calendar of the type set out, the combination of acasing, said casing having an aperture in the front thereof, adetachable back on the casing, alignment lugson the casing, a monthsheet visible through the aperture in the casing, a cancellation diskhaving cancelling lines arranged in a series of interrupted concentriccircles, mounted be tween the wall of the casing and the month sheet, amonth indicating means located in the casing, and said month sheet andback having cut away portions for engagement with the alignment lugs onthe casing.

10. In a perpetual calendar of the type set out, the combination of acasing, said casing having an aperture in the front thereof, adetachable back on the casing, a month sheet visible through theaperture in the casing,

